The Tully-Fischer method relies on being able to relate the mass of a galaxy to its rotation velocity. Stars in the outer-most regions of the Milky Way galaxy, located at a distance of 50 kpc from the galactic centre, are observed to orbit at a speed rot = 250 km s-¹. Using Kepler's 3rd Law, determine the mass in the Milky Way that lies interior to 50 kpc. Express your answer in units of the Solar mass.
The Tully-Fischer method relies on being able to relate the mass of a galaxy to its rotation velocity. Stars in the outer-most regions of the Milky Way galaxy, located at a distance of 50 kpc from the galactic centre, are observed to orbit at a speed rot = 250 km s-¹. Using Kepler's 3rd Law, determine the mass in the Milky Way that lies interior to 50 kpc. Express your answer in units of the Solar mass.
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![Question A6
The Tully-Fischer method relies on being able to relate the mass of a galaxy to its rotation velocity.
Stars in the outer-most regions of the Milky Way galaxy, located at a distance of 50 kpc from the
galactic centre, are observed to orbit at a speed Vrot = 250 km s-¹. Using Kepler's 3rd Law,
determine the mass in the Milky Way that lies interior to 50 kpc. Express your answer in units of
the Solar mass.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F8b15f582-90bf-4248-8ad2-3f9040e9bb5a%2F88a56a53-c224-4a1b-8b50-b1f871c9d407%2Fa3xf8t2_processed.png&w=3840&q=75)
Transcribed Image Text:Question A6
The Tully-Fischer method relies on being able to relate the mass of a galaxy to its rotation velocity.
Stars in the outer-most regions of the Milky Way galaxy, located at a distance of 50 kpc from the
galactic centre, are observed to orbit at a speed Vrot = 250 km s-¹. Using Kepler's 3rd Law,
determine the mass in the Milky Way that lies interior to 50 kpc. Express your answer in units of
the Solar mass.
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